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Finding the Fourth Proportional to 239.51, 359.51 and 161.42

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Solution

The fourth proportional to 239.51, 359.51 and 161.42 is: 242.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.51 : 359.51 = 161.42 : x
  2. Step 2: Convert to fraction form
    239.51/359.51 = 161.42/x
  3. Step 3: Cross multiply
    239.51x = 359.51 × 161.42
  4. Step 4: Simplify right side
    239.51x = 58,029.50
  5. Step 5: Solve for x
    x = 58,029.50/239.51
  6. Step 6: Final answer
    x = 242.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.